This two-digit digital pressure gauge was found in the 1992 special edition of Radio Electronics Experimenter. A/D converter integrated circuits are uncommon today.
This circuit was found in a Modern Transistor Workbook from 1965. The circuit sends signals from a...
What this interesting circuit does is to warn that a note written on a paper has been removed and...
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...